diff --git a/lib_acl_cpp/samples/tcp_pool/client/main.cpp b/lib_acl_cpp/samples/tcp_pool/client/main.cpp
index d7c3cea74..148a1331b 100644
--- a/lib_acl_cpp/samples/tcp_pool/client/main.cpp
+++ b/lib_acl_cpp/samples/tcp_pool/client/main.cpp
@@ -1,5 +1,9 @@
 #include "stdafx.h"
+#if defined(_WIN32) || defined(_WIN64)
 #include "lib_acl.h"
+#else
+#include <getopt.h>
+#endif
 
 class client_thread : public acl::thread
 {